Electric heater



1. R. BAKSTAD.

ELECTRIC HEATER. APmlcATloN min 00T. 7, 1920.

1,396,241, PatentedNov. 8,1921.

2 SHEETS-SHED 1.

J. R. BAKSTAD. ELECTR|C HEATER.

APPLICA-HON FILED OCT. "l, 1920- 1 396,241 Patented Nov. 8, 1921.

2 SHEETS-SHEEI 2.

3mm/Mofa UNITED STATES JOHAN R. BAKSTAD, 0F CHICAGO,

OF CHICAGO, vILLINOIS ELECTRIC HEATER.

Specification of Letters Patent.

Patented N ov. 8, 1921.

Application filed October 7, 1920. Serial No. 415,291.

To all whom t may concern:

Be it known that l, JOHAN R. BAKSTAD,

State of Illinois, have invented certain new and useful Improvements in Electric eaters, of which the following is a speciiication.

The .invention relates to electric heaters of a character adapted to the heating of passenger cars and pertains more particularly toa novel heater which mayl be applied under the seats of the car. tion is well adapted for street cars and the like and particularly to cars having cross seats.

The heater of my invention comprises a novel casing of sheet 'metal having a top plate, an inclosed Cutler-Hammer heating element and outwardly projecting end hanger-anges adapted to be secured on bars supported on the angle iron rails usually found atthe'yfront and rear edges of the car seat frames. The heater extends longitudinally of the car seat, and is suspended suitably below the seat-cushion by novel hanger members forming a part of the lheater and positioned on cross-bars whose ends are secured to 'the usual front and rear rails ofthe seat framing. f

The body casing of the heater of my in-- -vention is of elongated troughshape generally speaking and has a bottom and downwardly converging sides, at whose upper edges are flanges to receive the covering top plate, which is removable heating element within the casing.

sides and bottom of the casing may formed of one integral piece yof sheet metal and are perforated to permit of the exit of the heated air; and the ends in any desired location below the cushion of the carV seat, and the heater of my invention tively light in weight, compact, eilicient and capable of being easily installer. Y

The invention will be fully understood from the detailed description hereinafter presented, reference being had'to the accompanying drawings, in which:

Figure 1 is an end elevation,l partly in section and partly broken away, of a well through a portion of the dotted line 2`2 of Fig. 1;

Fig. 3 is a top view of the heater shown shown as partly broken away;

Fig. 4l is longitudinal section, partly broken way, through the same, taken on the dotted line M of Fig. 3, and

Fig. 5 is a transverse section through the same, taken on the dotted line 5-5 of Fig. 4, and showing the body-casing, cover-plate and fastening screws as juxtaposed for assembling.

In the drawings, I illustrate, in Fig. 1. a car seat of known type, 10 designating the cushion and 11 the general frame thereof. The frame 11 usually embodies front and rear angle bars or rails 12.

The heater of my invention is designed to be suspended below the cushion 10 and supported from the angle bars or rails 12 by means of cross-bars 13 whose ends rest upon and may be bolted to the horizontal flanges of said bars 12.

heater comprises a main or body-casing 14 of sheet metal and of general trough cover plate 15 for the upper end of said casing. The casing 14: comprises a bottom 16, downwardly converging sides' 17 and ends 18, said bottom and sides preferably being in one integral piece of sheet metal bent to form and perforated for the escape of heated air from within the casing. of the sides 17 have formed are perforated, as at 21, in the fiange 2O are threaded, and said flanges at said perforatons sition,

' folding over be secured downwardly means of which the cover-plate 15 may be fastened against the flanges 19 and directly over theA casing 14. The cover-plate 15 is plain and flat throu" hout its middle Vportions and its front and rear parts incline upwardly and outwardly so for the heated air leaving the casing 14. The cover plate 15 contains holes to receive the screws 22, and, as shown in Fig. `3, three screws at each side of the plate 15 are suflicient for securing said cover plate in posi- Jcion. 1t 'is desirable that there be no `rattling between the cover-plate 15 and the cas ing 14, and hence the flanges20 are normally' deflected downwardly and inwardly from the flanges 19 so that when the screws 22 are applied for securing the cover plate in po lsaid flanges 2O may be 4drawn upwardly to a slight extent toward the flanges 19 by said screws and exert a spring action tending to lock the vscrews 22 in position and bind the cover-plate 15 so firmly upon the flanges 19 that no rattling of the parts may take'place during the travel of the car. The flanges 19, 20 serve to properly cover 15 and also add material strength to the upper edges of the casingr14, and the of the metal at the upper vedges of the sides 17 to form the flanges 19, 2O affords such strength to the upper edges of the casing that sheet metal of reasonable thinness, thereby decreasing the weight and expense of Jche heater as well as increasing the efficiency thereof.

The ends 18 of the heater each in one integral piece ot s at their sides and lower `ends conform generally to the outline of the casing 14 in crosssection, and said ends 13 are 'formed at their side'and lower` edges with right angle flanges 23, 24, respectively, which closely receive and are secured by welding or otherwise to the ends of the casing 14, which is seated upon the flanges 24 and heldv at the ends of its sides 17 between the flanges 23, the latter terminating suitably below the flanges 2f.) so as not'to interfere therewith.. YThe ends-13 extend upwardly are preferably heet metal and above the body of the'casing 14 to create vertical hanger-members 25 and at their upper edges said members are formed with laterally extending flanges 26 which are horizontally disposed and pro ject outwardly inopposite directions from the heater and are adapted to rest upon and by s bolts 27, or fother suitable to the cross bars 13,v yas l illustrate in 4. The ends'13V are preferably the ends of the means, Figs, 3 and permanently secured upon body casing between the vertical members 25ct kthe ends 18 and saidv members 25 create adequate air spaces above the rplate 15 l and betweensaid plate and the adjacent portions of the car .seat abovepthe same lllie as to serve as deflectors 9 .the rails 12 in any heater may sup-p ort the t the latter may be made from` secured thereto and the cover-p with a metal plate below Y be omitted.

14. VThe cover-plate 15 setsV 'creating members 25 having the flanges 26 form hangers by which the heater may be readily ap plied to the cross-bars 13.Y Thecar seattrame usually has the rails 12 and the additional equipment required for securing my heater in position simply comprises the bars 13. The bars .13' will be located along the angle bars or rails 12 in such position may render the use `of: the heater most eflicient, and the provision of said cross-bars 13 adapts the heater to be properly secured in any desired position with relation to the parts oi the car seat and adapts the heater to car seats varying materially in details of construction. The bars 13 may be secured along; position desired, and the Y be secured in any position desired along the bars 13, thus permitting the heater to be located centrally below toward the front or back thereof and to such position lengthwise of the car seat as the occasion may render'more desirable. rl'he holes for the screws or bolts 27 by which the heater is secured tothe cross-bars 13 may be formed at any suitable Apoints valong said bars, as Vmaybe determinedv during the installation ofthe heaters,V and the holes for the bolts 28 by which the bars 13are secured to the angle rails 12 may be formed at any suitable points alongsaid rails that may y seem to be most desirable during the installation of the heaters. l y The heater comprises, aside from the heat# ing element, two main units, to-wit: the trough like vcasing 14 having the ends 18 late 15 which be applied to and removed from'the 14 whenever desired. The entire be readily removed from the car seat vbe equipped the cushionf10, as sometimes the case, the cover plate 15 may .il prefer to employ the cover plate 15, however, because said plate'closes theupper enc 14 and protects may casing heater may Y seat and should the car of the casing the heating element located withinthe casing and also serves to prevent the heat from acting against the cushion 10. l may, add that the doubled-over -llanges 19, 2O which receive the cover-plate 15 are important, since they not only strengthen the casing 14, butproperly receive andprevent rattling of the said cover-plate 15.V 1 have mentioned th openings 21 inthe flanges 2O arethreaded, but l find that the threading is Vnot impor-,- tant,since' when the flanges 2O are inclined, as shown, the thread on the screws 22 will engagethe c lowermost edge of .said openings in said .flanges 2O 'and -operate to draw the flanges 20 toward the flanges the spring action hereinbefore referred to. Y Y l have hereinbefore Vdescribed all of the features of theheater with the exception of the heating element, which I number as 'a 19, thereby the cai' seat or The heating or resistance element to its end features and means for mounting the same within the casing 14, is of known commercial typeand commonly designated as the Cutler-Hammer unit. rllhis unit, as is well-known, comprises a ribbon of fiat nichrome wire which is wound around a fiat mica core and firmly inclosed in a fiat steel casing which, in the drawing I number 30. A strip of mica is located between the ribbon and the casing 30 and provides the necessary electrical insulation, as usual.

The Cutler-Hammer unit is more particularly described in Letters Patent N o. 795,747, f1

dated July 25, 1905, and No. 811,859, dated February 6, 1906. The heating unit comprises a bar 31 extending lengthwise thereof and projecting' beyond the same, as shown in Fig. 3, and held by the sheet metal foldedover casing 30, and I utilize the ends of this bar as means for mounting the resistance element within the casing 14. Within the casing 14 at each end thereof, I secure upon the bottom of the casing an insulating block 32, whose construction is more particularly illustrated in Fig. 5, and upon the blocks 32 mount angle iron supports 33 which are formed of sheet metal and have their horizontal flanges bolted to the blocks 32 and their vertical members 34 extended upwardly at one side of the bar 31, and; I secure the ends of the bar 31 to said ,vertical members 34 by means of screw bolts 35, as shown in Figs. 4 and 5, said screw bolts extending through the vertical members 34 and through suitable openings in the bar 31, and said bolts being' insulated from said bar by mica disks 36. It is to be noticed that the resisting element may be handled as an entirety and applied to and removed from the casing 14 at will. 37, 38, respectively, indicate the conductors for the element 29, and they extend through one end of the casing 14, as shown in Fig. 4, and are secured at their terminal ends to the element 29 by means of screw-bolts 39 which permit of the ready application of said conductors to and their removal from the heating element 29. It is of considerable advantage that I am enabled to mount the element 29 within the body my invention and desire comprising a horizontally elongated perforated body casing having sides and ends which extend upwardly beyond said sides and are flanged to seat upon said cross bars, whereby the heater becomes suspended suitably below the car seat.

2. In combination, a car seat frame, crossbars extending between the front and rear portions thereof, an electric heater for suspension from said cross bars comprising a dy casing of general trough outline in cross-section having perforated sides, a botends and end members which extend v general trough outline in cross-section hava bottom, ends and a cover-plate, said sides having at their upper edges outwardly extending and return anges to receive said cover plate, said return anges being slightly inclined downwardly and inwardly, and both said flanges and said cover plate being perforated to receive securing screws, the inclination of said return anges affording a spring action for binding said cover-plate noiselessly upon said casing.

4. In combination, a car seat frame and an electric heater for suspension from said frame below the car seat comprising a body casing of general trough shape in cross-section having perforated sides, a bottom, ends and a cover plate secured upon the said sides, said ends conforming to the outline 5. In combination, a car seat frame, an electric heater and means suspending said heater from said frame below the car seat, said heater comprising a body portion of general trough outline in cross-section having perforated sides, a bottom and ends, a cover plate applied over said casing, a heating element Within said casing comprising a longitudinal bar set on edge, angle iron supports connected with the bottom of the casing and having upright members alongside of the ends of said bar and means detachably connecting said ends to said upright members.

Signed at Chicago, in the county of Cook, and State of Illinois, this 27th day of September, A. D. 1920.

JOHAN R. BAKSTAD. 

